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P. J. TRACY.

(No Model.)

FILTER.

No. 348,869. Patented Sept. 7, 1886.

WITNESSES. f1 4 Attorneys.

UNITED STATES PATENT OFFICE.

PATRICK JEROME TRACY, OF RACINE, WISCONSIN, ASSIGNOR OF ONE-HALF TO \V.T. LE\VIS, OF SAME PLACE.

FlL'l'ER.

' SPECIFICATION forming part of Letters Patent No. 348,869, datedSeptember '7, 1886.

Application filed March 519, 1886.

To all whom-it may concern:

Be it known that I, PATRICK JEROME TRACY, a citizen of the UnitedStates, and a resident of Racine, in the county of Racine and State of\Visconsin, have invented certain new and useful Improvements inFilters; and I do hereby declare that the following is a full, clear,and exact description of the invention, which will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, which form a part of thisspecification, and in which Figure 1. is a vertical sectional view of myimproved filter for fluids of a less specific gravity than water, andFig. 2 is a side view of the lilteriligvessel, showing one filteringtube in section.

Similar letters of reference indicate correspending parts in both thefigures.

My invention has relation to filters forfiltering fluids of a lessspecific gravity than water, especially adapted for the purpose offilteringoil; and it consists in the improved construction andcombination of parts of such a filter, in which the fluid to be filteredpasses first up through a bath of water, in which it is washed,whereupon it is drawn through filtering material into a reservoir orvessel, from which it may be drawn, as hereinafter more fully describedand claimed.

In the accompanying drawings, the letter A indicates a casing having acontracted central portion, 13, and a rounded bottom, 0, and the top ofthis casing is formed with a hinged lid or cover, D, and with aconcavo-convex top, E, having apipe, F, opening at its center andpassing down through the casing. A strainer, G, corresponding in shapeto the shape of the 40 concavo convex top is secured above it, and aflat partition, H, is secured in the casing under the top. The lower endof the pipe pass ing from the concavo-convex top is secured in the flattop of a receiving-vessel, I, having the central portion of the bottomof the casing forming its bottom, and the sides of this vessel areprovided with apertures J, covered with strainers K of wirecloth orperforated sheet metal. The center of the bottom of the casing andreceiving-vessel is provided with a Serial No. 196,979. (No model.)

pipe, L, which passes out through the side of the base M of the casing,and is provided with a cock, N, for drawing off the contents of thevessel.

A pipe, 0, has its upper end secured in the center of the upperpartition of the casing, above which the sides of the casing areprovided with air-inlets Q, and the lower end of the pipe is inserted inthe upper side of a cylindrical reservoir, P, supported in the eon- 6otracted portion of the casing. The heads of this reservoir are providedwith sleeves R R at their centers, the open ends of which sleeves areprovided with filtering-disks S, preferably made of bass-wood fiber orbass-wood fiber and felt, although other vegetable fiber may be used,and these filtering-disks are confined in the ends of the sleeves bymeans of caps T, fitting upon the sleeves and retained upon the same bymeans of L-shaped slots in the caps fitting upon pins projecting fromthe sleeves. The lower side of the reservor has a pipe, U, entering itat a point diametrically opposite to the point at which the air-pipe Oenters, and thispipe passes out trough the side of the casingimmediately below the contracted central portion of the same, where itis provided with a cock, V.

A gage-glass, \V, is connected by means of tubes X X with the lowerportion of the easing immediately under the reservoir-pipe, and with thepipe passing from the receiving-vessel, the said tubes having cocksY Y,for stopping the flow of fluid into the glass, if it by accident shouldbe broken, and the upper portion of the casing immediately below theflat partition is provided with a cock, Z.

The base may be provided with a suitable pipe-coil, A, connected to asteam-boiler or hot-air generator.

It will be seen that as the fluid to be filtered is poured into the topof the casing the coarser impurities will be filtered off by thestrainer, and the fluid will descend through the pipe into the vessel at.the bottom of the casing, from which it will pass out into awashingfinid, which is contained in the lower portion of the casing, thefluid to be filtered being finely divided by passing through theperforated strainers in the apertures of the vessel, which I09 act as adistributor. The fluid will be partly purified by passing through thewashing-fluid, and will float on the top of the same, filling the upperportion of the casing. From this portion of the casing the fluid willfilter into the reservoir, from which it may be drawn as it is used. Theair-pipe in the top of the reservoir will allow it to be filled, andwill allow the fluid to be drawn freely from it, connecting thereservoir with the outside air. All the heavier impurities which are notstrained off by the strainer at the top will sink to the bottom of thecasing and distributing-vessel, from the bottom of which they may bedrawn off through the cock and pipe connected thereto, and all lightimpuritieswhich will float upon the top of the fluid to be filtered maybe drawn off through the cock at the upper end of the casing, abovewhich point the fluid is permitted to rise.

The washingfluid, which is preferably water, in the ease of oil beingthe fluid to be filtered, may be either acidulated, or may contain somealkali for the purpose of cleaning and deodorizing it, and the oilpassing up through the water in the shape of small globules, beingfinely distributed by the strainers in the distributing-vessel, will bethoroughly washed by the water.

The gage will admit of examining the relative height of thewashing-fluid and the fluid to be filtered, and in cold weather, whenthe oil would be liable to be thick and to flow sluggish, the casing andits contents may be heated by steam or hot air passing through theheatingcoil.

Although this apparatus is preferably adapt ed for filtering oil,otherfiuids may be filtered and cleaned in the same, if the fluid to befiltered is of less specific gravity than the washing-fluid, and is ofsuch a nature that it will not miX with the washing-fluid.

I am aware that it is not new to construct filters with an inlet-pipeprovided at its top with a strainer, and passing down through thefiltering material, whereby the fluid to be filtered is caused to passbackup through the filtering material, nor to provide the filteringreservoir with a faucet at its bottom and a pipe at its top forconnecting it with the outside air,and I do not claim such construction,broadly; but

I claim and desire to secure by Letters Patent of the United States- 1.The combination of a casing having a washing-fluid at its lowerportion,a receivingvessel having a pipe extending to the bottom andhavingfiltering-apertures for the entrance of the fluid, as and for thepurpose shown and set forth.

2. In a filtering apparatus, the combination .of a casing containingawashing-flnid in its lower portion of a greater specific gravity thanthe fluid to be filtered, a receiving-vessel or funnel having a pipeextending to the bottom of the casing, and having the lower end providedwith a distributingvessel having apertures covered by strainers,and afilteringre'servoir having connection at its upper end with the outsideair, and having a pipe for drawing off its contents at its lower sideand provided with filtering-apertures, as and for the purpose shown andset forth.

3. In a filtering apparatus, the combination of a casing having acontracted central portion, and having a concavo-convex bottom providedwith a pipe and cock, and having a hinged lid and a concavo-convex topand a flat partition below the top, a strainer above the concave-convextop, a pipe passing from the top to the lower end of the casing, adistributing-vessel upon the bottom of the easing, having the pipeentering it, and having apertures in its sides covered by strainers, afiltering-reservoir having sleeves provided with filtering-disks in itsheads, and having an air-pipe passing up to the flat partition of thecasing, and having a pipe at its lower end passing out through the sideof the casing provided with a cook, a draw-oil? cock at the upper end ofthe casing, a gage-glass at the lower portion of the casing, and aheatingcoil in the base of the casing, as and for the pur pose shown andset forth.

4. In combination with a surrounding casing, a filtering-reservoircylindrical in shape, and having an air-inlet pipe and a draw-oif pipeat its upper and lower sides, and having sleeves at the centers of itsheads, filteringdisks in the ends of the sleeves, and caps securedremovably upon the ends of the sleeves, securing the disks, as and forthe purpose shown and set forth.

In testimony that I claim the foregoiu g as in y own I have hereuntoaifixed my signature in presence of two witnesses.

PATRICK JEROME TRACY.

\Vi tnesses:

FRANK IV. AINswoR'ri-I, MATT. H. LEAHY.

